Photographic elements having oxonol dyes
US4855221A · kind A · utility
26Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1987 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Jul 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/46
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photographic elements having oxonol dyes of the formula: ##STR1## R.sup.1 and R.sup.2 each independently represent alkyl of from 1 to 5 carbon atoms are disclosed. The dyes are particularly useful as filter dyes in the form of solid particle microcrystalline dispersions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.